Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 86c6bf4a3ff8e441af59be113a8e811f269fccf5ec4780120a68af700d438a57:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^